Monitor Users Guide
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Contents Safety instructions 5 About your monitor 6 Package contents 6 Product features 7 Identifying parts and controls 8 Front view 8 Back view 9 Bottom view 10 Monitor specifications 11 Resolution specifications 12 Preset display modes 13 Electrical specifications 13 Physical characteristics 14 Environmental characteristics 15 Power management modes 16 Pin Assignments 18 Plug-and-play 19 LCD monitor quality and pixel policy 19 Ergonomics 19 Handling and moving your display 21 Maintenance guidelines 22 Cleaning your monitor 22 Contents | 3
Contents Safety instructions 5 About your monitor 6 Package contents 6 Product features 7 Identifying parts and controls 8 Front view 8 Back view 9 Bottom view 10 Monitor specifications 11 Resolution specifications 12 Preset display modes 13 Electrical specifications 13 Physical characteristics 14 Environmental characteristics 15 Power management modes 16 Pin Assignments 18 Plug-and-play 19 LCD monitor quality and pixel policy 19 Ergonomics 19 Handling and moving your display 21 Maintenance guidelines 22 Cleaning your monitor 22 Contents | 3
Monitor Users Guide
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Setting up the monitor 23 Connecting the stand 23 Using the tilt 26 Connecting your monitor 27 Organizing your cables 28 Securing your monitor using Kensington lock (optional) 28 Removing the monitor stand 29 Wall mounting (Optional 30 Operating the monitor 31 Power on the monitor 31 Using the front panel controls 31 Using the OSD lock function 33 Front‑panel button 35 Using the On-Screen Display (OSD) menu 36 Accessing the menu system 36 OSD warning messages 47 Setting the maximum resolution 49 Troubleshooting 50 Self...
Setting up the monitor 23 Connecting the stand 23 Using the tilt 26 Connecting your monitor 27 Organizing your cables 28 Securing your monitor using Kensington lock (optional) 28 Removing the monitor stand 29 Wall mounting (Optional 30 Operating the monitor 31 Power on the monitor 31 Using the front panel controls 31 Using the OSD lock function 33 Front‑panel button 35 Using the On-Screen Display (OSD) menu 36 Accessing the menu system 36 OSD warning messages 47 Setting the maximum resolution 49 Troubleshooting 50 Self...
Monitor Users Guide
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... screen optimization. • Supports AMD FreeSyncTM technology. or its subsidiaries. 2020-07 6 2 i i 5° 21° www.dell.com/contactdell Dell.com/S2421HN/NX Dell.com/S2721HN/NX 746.A3E01.0001 (DELL P/N: PNF73 rev.X01) • Quick Setup Guide • Safety, Environmental, and Regulatory Information Product features The Dell S2421HN/S2421NX/S2721HN/S2721NX monitor has an active matrix, Thin Film Transistor (TFT), Liquid Crystal Display (LCD), and LED backlight. HDMI cable Dell...
... screen optimization. • Supports AMD FreeSyncTM technology. or its subsidiaries. 2020-07 6 2 i i 5° 21° www.dell.com/contactdell Dell.com/S2421HN/NX Dell.com/S2721HN/NX 746.A3E01.0001 (DELL P/N: PNF73 rev.X01) • Quick Setup Guide • Safety, Environmental, and Regulatory Information Product features The Dell S2421HN/S2421NX/S2721HN/S2721NX monitor has an active matrix, Thin Film Transistor (TFT), Liquid Crystal Display (LCD), and LED backlight. HDMI cable Dell...
Monitor Users Guide
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... 1 VESA mounting holes (100 mm x 100 mm-behind attached VESA cover) 2 Regulatory label 3 Stand release button 4 Barcode, serial number, and Service Tag label 5 Cable management slot Use Wall mount monitor using VESA- Operation is a unique alphanumeric identifier that may not cause harmful interference, and (2) this label if you need to contact Dell for EU Only: Raheen Business Park Limerick Ireland www.dell.com/regulatory_compliance XXXXX И005-20 DELL Flat Panel Monitor S2421HN Input Rating...
... 1 VESA mounting holes (100 mm x 100 mm-behind attached VESA cover) 2 Regulatory label 3 Stand release button 4 Barcode, serial number, and Service Tag label 5 Cable management slot Use Wall mount monitor using VESA- Operation is a unique alphanumeric identifier that may not cause harmful interference, and (2) this label if you need to contact Dell for EU Only: Raheen Business Park Limerick Ireland www.dell.com/regulatory_compliance XXXXX И005-20 DELL Flat Panel Monitor S2421HN Input Rating...
Monitor Users Guide
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Only two-channel audio is supported. Bottom view 12 3 45 S2421HN/S2721HN Label Description 1 Security lock slot 2 Power connector 3 HDMI port 1 4 HDMI port 2 5 Audio Line-out port 12 3 45 S2421NX/S2721NX Use Secures monitor with your monitor). Connect the power cable (shipped with security cable lock (sold separately). NOTE: The audio line-out port does not support headphones. 10 | About your computer with HDMI cable. Connect your computer with HDMI cable. Connect your monitor Connect speakers to playback audio coming through HDMI audio channel.
Only two-channel audio is supported. Bottom view 12 3 45 S2421HN/S2721HN Label Description 1 Security lock slot 2 Power connector 3 HDMI port 1 4 HDMI port 2 5 Audio Line-out port 12 3 45 S2421NX/S2721NX Use Secures monitor with your monitor). Connect the power cable (shipped with security cable lock (sold separately). NOTE: The audio line-out port does not support headphones. 10 | About your computer with HDMI cable. Connect your computer with HDMI cable. Connect your monitor Connect speakers to playback audio coming through HDMI audio channel.
Monitor Users Guide
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... Gray) 8 ms (normal) 5 ms (fast) 4 ms (extreme) Color depth 16.7 million colors Color gamut* NTSC 72% Connectivity • 2 x HDMI 1.4 • 1 x Audio line-out(3.5 mm jack) Border width (edge of monitor to active area) Top/Left/Right 5.4 mm 6.0 mm Bottom 20.7 mm 21.3 mm Adjustability Height adjustable NA stand Tilt -5° to 21° About your monitor | 11 Monitor specifications Model S2421HN/S2421NX S2721HN/S2721NX Screen type Active matrix -
... Gray) 8 ms (normal) 5 ms (fast) 4 ms (extreme) Color depth 16.7 million colors Color gamut* NTSC 72% Connectivity • 2 x HDMI 1.4 • 1 x Audio line-out(3.5 mm jack) Border width (edge of monitor to active area) Top/Left/Right 5.4 mm 6.0 mm Bottom 20.7 mm 21.3 mm Adjustability Height adjustable NA stand Tilt -5° to 21° About your monitor | 11 Monitor specifications Model S2421HN/S2421NX S2721HN/S2721NX Screen type Active matrix -
Monitor Users Guide
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Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable 2. Yes No S2421HN/S2421NX/S2721HN/S2721NX 3. Once locked, pressing any control button will display the lock icon Use the front-panel control button to the User's Guide. Select one of the following message appears. To unlock the Buttons, refer to lock the button(s). 1234 5 Operating the monitor | 33 Select Yes to lock the Menu Buttons? Dell 24/27 Monitor Are you sure you want to...
Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable 2. Yes No S2421HN/S2421NX/S2721HN/S2721NX 3. Once locked, pressing any control button will display the lock icon Use the front-panel control button to the User's Guide. Select one of the following message appears. To unlock the Buttons, refer to lock the button(s). 1234 5 Operating the monitor | 33 Select Yes to lock the Menu Buttons? Dell 24/27 Monitor Are you sure you want to...
Monitor Users Guide
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Power Button unlock 3 Use this option to unlock OSD menu and power button to adjust the image settings. Built-in Diagnostics Front‑panel button Use the buttons on the front of the monitor to turn off the monitor. OK Operating the monitor | 35 Menu and Power Button unlock 4 Use this option to adjust items in Diagnostics. Front Panel Button 1 Up Down 2 1 23 Description Use the Up (increase) and Down (decrease) buttons to run the built-in diagnostics, see Built-in...
Power Button unlock 3 Use this option to unlock OSD menu and power button to adjust the image settings. Built-in Diagnostics Front‑panel button Use the buttons on the front of the monitor to turn off the monitor. OK Operating the monitor | 35 Menu and Power Button unlock 4 Use this option to adjust items in Diagnostics. Front Panel Button 1 Up Down 2 1 23 Description Use the Up (increase) and Down (decrease) buttons to run the built-in diagnostics, see Built-in...
Monitor Users Guide
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...using the HDMI1 connector. Use the Color menu to select Auto Select, the monitor scans for available input sources. Icon Menu and Submenus HDMI 1 HDMI 2 Auto Select Reset Input Source Color Description Select HDMI1 input when you are using the HDMI2 connector. Use to adjust the color setting mode. Use to the factory defaults. Resets your monitor's Input Source settings to select the HDMI input source. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color Standard RGB 38 | Operating the monitor Use...
...using the HDMI1 connector. Use the Color menu to select Auto Select, the monitor scans for available input sources. Icon Menu and Submenus HDMI 1 HDMI 2 Auto Select Reset Input Source Color Description Select HDMI1 input when you are using the HDMI2 connector. Use to adjust the color setting mode. Use to the factory defaults. Resets your monitor's Input Source settings to select the HDMI input source. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color Standard RGB 38 | Operating the monitor Use...
Monitor Users Guide
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... preset color mode. The screen appears cooler with a red/yellow tint. • Cool : Decreases the color temperature. The screen appears warmer with blue tint. • Custom Color: Allows you to set the video input mode to manually adjust the color settings. Resets your monitor's color settings to 100. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color RGB YPbPr Hue Saturation Reset Color Use or to adjust the hue from 0 to the factory defaults. 40 | Operating the monitor Icon Menu...
... preset color mode. The screen appears cooler with a red/yellow tint. • Cool : Decreases the color temperature. The screen appears warmer with blue tint. • Custom Color: Allows you to set the video input mode to manually adjust the color settings. Resets your monitor's color settings to 100. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color RGB YPbPr Hue Saturation Reset Color Use or to adjust the hue from 0 to the factory defaults. 40 | Operating the monitor Icon Menu...
Monitor Users Guide
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... Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable Reset Menu • Menu Buttons: Through OSD to lock the Menu buttons. • Power Button: Through OSD to lock the Power button. • Menu + Power Buttons: Through OSD to lock the all of Menu and Power buttons. • Disable: Press and hold the button next to the power button for four seconds to adjustments. Icon Menu and Submenus Lock Description Controls user access to unlock the buttons...
... Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable Reset Menu • Menu Buttons: Through OSD to lock the Menu buttons. • Power Button: Through OSD to lock the Power button. • Menu + Power Buttons: Through OSD to lock the all of Menu and Power buttons. • Disable: Press and hold the button next to the power button for four seconds to adjustments. Icon Menu and Submenus Lock Description Controls user access to unlock the buttons...
Monitor Users Guide
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... from Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio set as shortcut key 1. LED Reset Restores shortcut keys to save energy. Power Button Allows you to set the state of the power light to factory defaults. Icon Menu and Submenus Personalize Description Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Shortcut Key 1 Shortcut Key 2 Power Button LED Reset Personalization Preset Modes Input Source On In On Mode Shortcut key 1 Select from Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio set as shortcut...
... from Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio set as shortcut key 1. LED Reset Restores shortcut keys to save energy. Power Button Allows you to set the state of the power light to factory defaults. Icon Menu and Submenus Personalize Description Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Shortcut Key 1 Shortcut Key 2 Power Button LED Reset Personalization Preset Modes Input Source On In On Mode Shortcut key 1 Select from Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio set as shortcut...
Monitor Users Guide
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... adjust the OSD settings such as the DDC/CI, LCD conditioning, and so on your monitor. DDC/CI (Display Data Channel/Command Interface) allows you to adjust the monitor settings using software on . Icon Menu and Submenus Others Description Select this option to turn off this feature for best user experience and optimum performance of your computer. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning O Display Menu Personalize Firmware Service...
... adjust the OSD settings such as the DDC/CI, LCD conditioning, and so on your monitor. DDC/CI (Display Data Channel/Command Interface) allows you to adjust the monitor settings using software on . Icon Menu and Submenus Others Description Select this option to turn off this feature for best user experience and optimum performance of your computer. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning O Display Menu Personalize Firmware Service...
Monitor Users Guide
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... correct input source. Dell 27 Monitor No HDMI1 Cable The display will go into Standby Mode in 4 minutes. www.dell.com/support/S2421HN www.dell.com/support/S2421NX or Dell 24 Monitor No HDMI2 Cable The display will go into Standby Mode in 4 minutes. S2421HN/S2421NX S2721HN/S2721NX Dell 24 Monitor No HDMI1 Cable The display will go into Power Save Mode in 4 minutes. S2421HN/S2421NX www.dell.com/support/S2721HN www.dell.com/support/S2721NX or S2721HN/S2721NX Dell 27 Monitor...
... correct input source. Dell 27 Monitor No HDMI1 Cable The display will go into Standby Mode in 4 minutes. www.dell.com/support/S2421HN www.dell.com/support/S2421NX or Dell 24 Monitor No HDMI2 Cable The display will go into Standby Mode in 4 minutes. S2421HN/S2421NX S2721HN/S2721NX Dell 24 Monitor No HDMI1 Cable The display will go into Power Save Mode in 4 minutes. S2421HN/S2421NX www.dell.com/support/S2721HN www.dell.com/support/S2721NX or S2721HN/S2721NX Dell 27 Monitor...
Monitor Users Guide
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... operation, remove all video cables from the back of the dialogs shown below will go into Standby Mode in this section, follow the Safety instructions. www.dell.com/support/S2421HN www.dell.com/support/S2421NX or Dell 24 Monitor No HDMI2 Cable The display will continuously scroll through the screen. Turn on -screen (against a black background), if the monitor cannot sense a video signal and is disconnected or damaged. 5. Turn off your monitor and...
... operation, remove all video cables from the back of the dialogs shown below will go into Standby Mode in this section, follow the Safety instructions. www.dell.com/support/S2421HN www.dell.com/support/S2421NX or Dell 24 Monitor No HDMI2 Cable The display will continuously scroll through the screen. Turn on -screen (against a black background), if the monitor cannot sense a video signal and is disconnected or damaged. 5. Turn off your monitor and...
Monitor Users Guide
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... complete when the text screen appears. Press Button 1 on the surface of the screen changes to green, blue, black, white, and text screens. To exit, press Button 1 again. A gray screen appears. 4. If your monitor screen remains blank after you use the previous procedure, check your video controller and computer, because your computer and video card. 1234 5 To run the built-in diagnostics: 1. Inspect the display for any screen abnormalities during the...
... complete when the text screen appears. Press Button 1 on the surface of the screen changes to green, blue, black, white, and text screens. To exit, press Button 1 again. A gray screen appears. 4. If your monitor screen remains blank after you use the previous procedure, check your video controller and computer, because your computer and video card. 1234 5 To run the built-in diagnostics: 1. Inspect the display for any screen abnormalities during the...
Monitor Users Guide
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....dell.com/support/monitors. Brightness Problems Picture too dim • Reset the monitor to factory settings. or too bright • Adjust brightness and contrast controls through OSD. • Perform monitor self-test feature check. • Check for bent or broken pins in the video cable connector. • Run the built-in diagnostics. • Ensure that the correct input source is selected in the Input Source menu. No Video/ No picture or no • Increase brightness and contrast controls Power LED on brightness through OSD. 52 | Troubleshooting Common problems...
....dell.com/support/monitors. Brightness Problems Picture too dim • Reset the monitor to factory settings. or too bright • Adjust brightness and contrast controls through OSD. • Perform monitor self-test feature check. • Check for bent or broken pins in the video cable connector. • Run the built-in diagnostics. • Ensure that the correct input source is selected in the Input Source menu. No Video/ No picture or no • Increase brightness and contrast controls Power LED on brightness through OSD. 52 | Troubleshooting Common problems...
Monitor Users Guide
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.... Troubleshooting | 53 Image retention Faint shadow • Use the Power Management feature to PC RGB or YPbPr in the Color menu OSD. • Run the built-in the video cable connector. Intermittent Problems Monitor • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure. • Reset the monitor to factory settings. • Perform monitor self-test feature check to determine if the intermittent problem occurs in use a dynamically changing...
.... Troubleshooting | 53 Image retention Faint shadow • Use the Power Management feature to PC RGB or YPbPr in the Color menu OSD. • Run the built-in the video cable connector. Intermittent Problems Monitor • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure. • Reset the monitor to factory settings. • Perform monitor self-test feature check to determine if the intermittent problem occurs in use a dynamically changing...
Monitor Users Guide
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...; Check whether the signal cable is plugged in the too small on screen, but does Display menu OSD. The picture The picture cannot • Due to factory settings. No Input Signal when user controls are pressed No picture, the LED light is centered • Check the Aspect Ratio setting in properly. Connect the signal cable again, if necessary. • Reset the computer or video player. Product specific problems Problem What you experience Possible solutions Screen image is Image is white • Check the signal source. Ensure...
...; Check whether the signal cable is plugged in the too small on screen, but does Display menu OSD. The picture The picture cannot • Due to factory settings. No Input Signal when user controls are pressed No picture, the LED light is centered • Check the Aspect Ratio setting in properly. Connect the signal cable again, if necessary. • Reset the computer or video player. Product specific problems Problem What you experience Possible solutions Screen image is Image is white • Check the signal source. Ensure...
Monitor Display Manager Users Guide
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... manual adjustment of the displayed image, assignment of displays. Standard S2421HN/S2421NX Dell S2721HN/S2721NX - Standard S2721HN/S2721NX NOTE: Dell Display Manager uses DDC/CI channel to manage a display or a group of automatic settings, energy management, window organization, image rotation, and other features on selected Dell displays. Ensure that DDC/CI is enabled in the notification tray. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning O Display Menu Personalize Firmware Service Tag Reset...
... manual adjustment of the displayed image, assignment of displays. Standard S2421HN/S2421NX Dell S2721HN/S2721NX - Standard S2721HN/S2721NX NOTE: Dell Display Manager uses DDC/CI channel to manage a display or a group of automatic settings, energy management, window organization, image rotation, and other features on selected Dell displays. Ensure that DDC/CI is enabled in the notification tray. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning O Display Menu Personalize Firmware Service Tag Reset...